case 1<BR>In 2D coordinate system the sum of the angles of all quadrants=360 degree= 2pi radian<BR>in (x,y) plane<BR>Case 2<BR>In 3D coordinate system (x,y,z) I took 3 possible ...

This post is in partnership with History Today. The article below was originally published at History Today. In school we learn there are 360 degrees in a circle, but where did the 360 come from? When ...